package st;

import syntaxtree.*;
import visitor.*;
import java.util.*;
import misc.*;

/**
 * Performs a bottom-up preliminary visit through the AST
 * initializing all ClassInstances and placing them in the passed ST
 */
public class SymTableExtend<R> extends GJDepthFirst<R,SymbolTable> {


    /**
     * f0 -> "class"
     * f1 -> Identifier()
     * f2 -> "extends"
     * f3 -> Identifier()
     * f4 -> "{"
     * f5 -> ( VarDeclaration() )*
     * f6 -> ( MethodDeclaration() )*
     * f7 -> "}"
     */
    public R visit(ClassExtendsDeclaration n, SymbolTable symt) {
        String act = n.f1.f0.tokenImage;
        symt.setActive(TypeEnum.classname, symt.getClass(act));
        n.f0.accept(this, symt);
        n.f1.accept(this, symt);
        n.f2.accept(this, symt);
        n.f3.accept(this, symt);
        n.f4.accept(this, symt);
        n.f5.accept(this, symt);
        n.f6.accept(this, symt);
        n.f7.accept(this, symt);


        symt.setExtend(n.f3.f0.tokenImage);


        return null;
    }

}